arturpanteleev No, the word you used is astigmatism (spherical distortions). This is not what was mentioned, the most recent reply is about нистагм which is small jerking movements of the eye, which can be caused by many things including inner-ear disorders. I would advise you, if you're getting glasses for desktop use, to tell the person making the prescription how far away you sit in CM from your screen. It is not enough to say reading distance, because the distance for books is different from that of screens.